1 files changed, 180 insertions, 169 deletions

diff --git a/fs/hostfs/hostfs_user.c b/fs/hostfs/hostfs_user.c
index b97809deba6..67838f3aa20 100644
--- a/fs/hostfs/hostfs_user.c
+++ b/fs/hostfs/hostfs_user.c
@@ -1,106 +1,89 @@
 /*
- * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  * Licensed under the GPL
  */
 
-#include <unistd.h>
 #include <stdio.h>
-#include <fcntl.h>
+#include <stddef.h>
+#include <unistd.h>
 #include <dirent.h>
 #include <errno.h>
-#include <utime.h>
+#include <fcntl.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <sys/time.h>
+#include <sys/types.h>
 #include <sys/vfs.h>
 #include "hostfs.h"
-#include "kern_util.h"
-#include "user.h"
-
-int stat_file(const char *path, unsigned long long *inode_out, int *mode_out,
-	      int *nlink_out, int *uid_out, int *gid_out,
-	      unsigned long long *size_out, struct timespec *atime_out,
-	      struct timespec *mtime_out, struct timespec *ctime_out,
-	      int *blksize_out, unsigned long long *blocks_out)
-{
-	struct stat64 buf;
+#include <utime.h>
 
-	if(lstat64(path, &buf) < 0)
-		return(-errno);
-
-	if(inode_out != NULL) *inode_out = buf.st_ino;
-	if(mode_out != NULL) *mode_out = buf.st_mode;
-	if(nlink_out != NULL) *nlink_out = buf.st_nlink;
-	if(uid_out != NULL) *uid_out = buf.st_uid;
-	if(gid_out != NULL) *gid_out = buf.st_gid;
-	if(size_out != NULL) *size_out = buf.st_size;
-	if(atime_out != NULL) {
-		atime_out->tv_sec = buf.st_atime;
-		atime_out->tv_nsec = 0;
-	}
-	if(mtime_out != NULL) {
-		mtime_out->tv_sec = buf.st_mtime;
-		mtime_out->tv_nsec = 0;
-	}
-	if(ctime_out != NULL) {
-		ctime_out->tv_sec = buf.st_ctime;
-		ctime_out->tv_nsec = 0;
-	}
-	if(blksize_out != NULL) *blksize_out = buf.st_blksize;
-	if(blocks_out != NULL) *blocks_out = buf.st_blocks;
-	return(0);
+static void stat64_to_hostfs(const struct stat64 *buf, struct hostfs_stat *p)
+{
+	p->ino = buf->st_ino;
+	p->mode = buf->st_mode;
+	p->nlink = buf->st_nlink;
+	p->uid = buf->st_uid;
+	p->gid = buf->st_gid;
+	p->size = buf->st_size;
+	p->atime.tv_sec = buf->st_atime;
+	p->atime.tv_nsec = 0;
+	p->ctime.tv_sec = buf->st_ctime;
+	p->ctime.tv_nsec = 0;
+	p->mtime.tv_sec = buf->st_mtime;
+	p->mtime.tv_nsec = 0;
+	p->blksize = buf->st_blksize;
+	p->blocks = buf->st_blocks;
+	p->maj = os_major(buf->st_rdev);
+	p->min = os_minor(buf->st_rdev);
 }
 
-int file_type(const char *path, int *maj, int *min)
+int stat_file(const char *path, struct hostfs_stat *p, int fd)
 {
- 	struct stat64 buf;
-
-	if(lstat64(path, &buf) < 0)
-		return(-errno);
-	/*We cannot pass rdev as is because glibc and the kernel disagree
-	 *about its definition.*/
-	if(maj != NULL)
-		*maj = major(buf.st_rdev);
-	if(min != NULL)
-		*min = minor(buf.st_rdev);
-
-	if(S_ISDIR(buf.st_mode)) return(OS_TYPE_DIR);
-	else if(S_ISLNK(buf.st_mode)) return(OS_TYPE_SYMLINK);
-	else if(S_ISCHR(buf.st_mode)) return(OS_TYPE_CHARDEV);
-	else if(S_ISBLK(buf.st_mode)) return(OS_TYPE_BLOCKDEV);
-	else if(S_ISFIFO(buf.st_mode))return(OS_TYPE_FIFO);
-	else if(S_ISSOCK(buf.st_mode))return(OS_TYPE_SOCK);
-	else return(OS_TYPE_FILE);
+	struct stat64 buf;
+
+	if (fd >= 0) {
+		if (fstat64(fd, &buf) < 0)
+			return -errno;
+	} else if (lstat64(path, &buf) < 0) {
+		return -errno;
+	}
+	stat64_to_hostfs(&buf, p);
+	return 0;
 }
 
 int access_file(char *path, int r, int w, int x)
 {
 	int mode = 0;
 
-	if(r) mode = R_OK;
-	if(w) mode |= W_OK;
-	if(x) mode |= X_OK;
-	if(access(path, mode) != 0) return(-errno);
-	else return(0);
+	if (r)
+		mode = R_OK;
+	if (w)
+		mode |= W_OK;
+	if (x)
+		mode |= X_OK;
+	if (access(path, mode) != 0)
+		return -errno;
+	else return 0;
 }
 
 int open_file(char *path, int r, int w, int append)
 {
 	int mode = 0, fd;
 
-	if(r && !w)
+	if (r && !w)
 		mode = O_RDONLY;
-	else if(!r && w)
+	else if (!r && w)
 		mode = O_WRONLY;
-	else if(r && w)
+	else if (r && w)
 		mode = O_RDWR;
 	else panic("Impossible mode in open_file");
 
-	if(append)
+	if (append)
 		mode |= O_APPEND;
 	fd = open64(path, mode);
-	if(fd < 0) return(-errno);
-	else return(fd);
+	if (fd < 0)
+		return -errno;
+	else return fd;
 }
 
 void *open_dir(char *path, int *err_out)
@@ -109,23 +92,26 @@ void *open_dir(char *path, int *err_out)
 
 	dir = opendir(path);
 	*err_out = errno;
-	if(dir == NULL) return(NULL);
-	return(dir);
+
+	return dir;
 }
 
 char *read_dir(void *stream, unsigned long long *pos,
-	       unsigned long long *ino_out, int *len_out)
+	       unsigned long long *ino_out, int *len_out,
+	       unsigned int *type_out)
 {
 	DIR *dir = stream;
 	struct dirent *ent;
 
 	seekdir(dir, *pos);
 	ent = readdir(dir);
-	if(ent == NULL) return(NULL);
+	if (ent == NULL)
+		return NULL;
 	*len_out = strlen(ent->d_name);
 	*ino_out = ent->d_ino;
+	*type_out = ent->d_type;
 	*pos = telldir(dir);
-	return(ent->d_name);
+	return ent->d_name;
 }
 
 int read_file(int fd, unsigned long long *offset, char *buf, int len)
@@ -133,9 +119,10 @@ int read_file(int fd, unsigned long long *offset, char *buf, int len)
 	int n;
 
 	n = pread64(fd, buf, len, *offset);
-	if(n < 0) return(-errno);
+	if (n < 0)
+		return -errno;
 	*offset += n;
-	return(n);
+	return n;
 }
 
 int write_file(int fd, unsigned long long *offset, const char *buf, int len)
@@ -143,9 +130,10 @@ int write_file(int fd, unsigned long long *offset, const char *buf, int len)
 	int n;
 
 	n = pwrite64(fd, buf, len, *offset);
-	if(n < 0) return(-errno);
+	if (n < 0)
+		return -errno;
 	*offset += n;
-	return(n);
+	return n;
 }
 
 int lseek_file(int fd, long long offset, int whence)
@@ -153,9 +141,9 @@ int lseek_file(int fd, long long offset, int whence)
 	int ret;
 
 	ret = lseek64(fd, offset, whence);
-	if(ret < 0)
-		return(-errno);
-	return(0);
+	if (ret < 0)
+		return -errno;
+	return 0;
 }
 
 int fsync_file(int fd, int datasync)
@@ -171,6 +159,11 @@ int fsync_file(int fd, int datasync)
 	return 0;
 }
 
+int replace_file(int oldfd, int fd)
+{
+	return dup2(oldfd, fd);
+}
+
 void close_file(void *stream)
 {
 	close(*((int *) stream));
@@ -197,66 +190,92 @@ int file_create(char *name, int ur, int uw, int ux, int gr,
 	mode |= ow ? S_IWOTH : 0;
 	mode |= ox ? S_IXOTH : 0;
 	fd = open64(name, O_CREAT | O_RDWR, mode);
-	if(fd < 0)
-		return(-errno);
-	return(fd);
+	if (fd < 0)
+		return -errno;
+	return fd;
 }
 
-int set_attr(const char *file, struct hostfs_iattr *attrs)
+int set_attr(const char *file, struct hostfs_iattr *attrs, int fd)
 {
-	struct utimbuf buf;
+	struct hostfs_stat st;
+	struct timeval times[2];
 	int err, ma;
 
-	if(attrs->ia_valid & HOSTFS_ATTR_MODE){
-		if(chmod(file, attrs->ia_mode) != 0) return(-errno);
-	}
-	if(attrs->ia_valid & HOSTFS_ATTR_UID){
-		if(chown(file, attrs->ia_uid, -1)) return(-errno);
+	if (attrs->ia_valid & HOSTFS_ATTR_MODE) {
+		if (fd >= 0) {
+			if (fchmod(fd, attrs->ia_mode) != 0)
+				return -errno;
+		} else if (chmod(file, attrs->ia_mode) != 0) {
+			return -errno;
+		}
 	}
-	if(attrs->ia_valid & HOSTFS_ATTR_GID){
-		if(chown(file, -1, attrs->ia_gid)) return(-errno);
+	if (attrs->ia_valid & HOSTFS_ATTR_UID) {
+		if (fd >= 0) {
+			if (fchown(fd, attrs->ia_uid, -1))
+				return -errno;
+		} else if (chown(file, attrs->ia_uid, -1)) {
+			return -errno;
+		}
 	}
-	if(attrs->ia_valid & HOSTFS_ATTR_SIZE){
-		if(truncate(file, attrs->ia_size)) return(-errno);
+	if (attrs->ia_valid & HOSTFS_ATTR_GID) {
+		if (fd >= 0) {
+			if (fchown(fd, -1, attrs->ia_gid))
+				return -errno;
+		} else if (chown(file, -1, attrs->ia_gid)) {
+			return -errno;
+		}
 	}
-	ma = HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET;
-	if((attrs->ia_valid & ma) == ma){
-		buf.actime = attrs->ia_atime.tv_sec;
-		buf.modtime = attrs->ia_mtime.tv_sec;
-		if(utime(file, &buf) != 0) return(-errno);
+	if (attrs->ia_valid & HOSTFS_ATTR_SIZE) {
+		if (fd >= 0) {
+			if (ftruncate(fd, attrs->ia_size))
+				return -errno;
+		} else if (truncate(file, attrs->ia_size)) {
+			return -errno;
+		}
 	}
-	else {
-		struct timespec ts;
-
-		if(attrs->ia_valid & HOSTFS_ATTR_ATIME_SET){
-			err = stat_file(file, NULL, NULL, NULL, NULL, NULL,
-					NULL, NULL, &ts, NULL, NULL, NULL);
-			if(err != 0)
-				return(err);
-			buf.actime = attrs->ia_atime.tv_sec;
-			buf.modtime = ts.tv_sec;
-			if(utime(file, &buf) != 0)
-				return(-errno);
+
+	/*
+	 * Update accessed and/or modified time, in two parts: first set
+	 * times according to the changes to perform, and then call futimes()
+	 * or utimes() to apply them.
+	 */
+	ma = (HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET);
+	if (attrs->ia_valid & ma) {
+		err = stat_file(file, &st, fd);
+		if (err != 0)
+			return err;
+
+		times[0].tv_sec = st.atime.tv_sec;
+		times[0].tv_usec = st.atime.tv_nsec / 1000;
+		times[1].tv_sec = st.mtime.tv_sec;
+		times[1].tv_usec = st.mtime.tv_nsec / 1000;
+
+		if (attrs->ia_valid & HOSTFS_ATTR_ATIME_SET) {
+			times[0].tv_sec = attrs->ia_atime.tv_sec;
+			times[0].tv_usec = attrs->ia_atime.tv_nsec / 1000;
 		}
-		if(attrs->ia_valid & HOSTFS_ATTR_MTIME_SET){
-			err = stat_file(file, NULL, NULL, NULL, NULL, NULL,
-					NULL, &ts, NULL, NULL, NULL, NULL);
-			if(err != 0)
-				return(err);
-			buf.actime = ts.tv_sec;
-			buf.modtime = attrs->ia_mtime.tv_sec;
-			if(utime(file, &buf) != 0)
-				return(-errno);
+		if (attrs->ia_valid & HOSTFS_ATTR_MTIME_SET) {
+			times[1].tv_sec = attrs->ia_mtime.tv_sec;
+			times[1].tv_usec = attrs->ia_mtime.tv_nsec / 1000;
+		}
+
+		if (fd >= 0) {
+			if (futimes(fd, times) != 0)
+				return -errno;
+		} else if (utimes(file, times) != 0) {
+			return -errno;
 		}
 	}
-	if(attrs->ia_valid & HOSTFS_ATTR_CTIME) ;
-	if(attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)){
-		err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL,
-				&attrs->ia_atime, &attrs->ia_mtime, NULL,
-				NULL, NULL);
-		if(err != 0) return(err);
+
+	/* Note: ctime is not handled */
+	if (attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)) {
+		err = stat_file(file, &st, fd);
+		attrs->ia_atime = st.atime;
+		attrs->ia_mtime = st.mtime;
+		if (err != 0)
+			return err;
 	}
-	return(0);
+	return 0;
 }
 
 int make_symlink(const char *from, const char *to)
@@ -264,8 +283,9 @@ int make_symlink(const char *from, const char *to)
 	int err;
 
 	err = symlink(to, from);
-	if(err) return(-errno);
-	return(0);
+	if (err)
+		return -errno;
+	return 0;
 }
 
 int unlink_file(const char *file)
@@ -273,8 +293,9 @@ int unlink_file(const char *file)
 	int err;
 
 	err = unlink(file);
-	if(err) return(-errno);
-	return(0);
+	if (err)
+		return -errno;
+	return 0;
 }
 
 int do_mkdir(const char *file, int mode)
@@ -282,8 +303,9 @@ int do_mkdir(const char *file, int mode)
 	int err;
 
 	err = mkdir(file, mode);
-	if(err) return(-errno);
-	return(0);
+	if (err)
+		return -errno;
+	return 0;
 }
 
 int do_rmdir(const char *file)
@@ -291,17 +313,19 @@ int do_rmdir(const char *file)
 	int err;
 
 	err = rmdir(file);
-	if(err) return(-errno);
-	return(0);
+	if (err)
+		return -errno;
+	return 0;
 }
 
-int do_mknod(const char *file, int mode, int dev)
+int do_mknod(const char *file, int mode, unsigned int major, unsigned int minor)
 {
 	int err;
 
-	err = mknod(file, mode, dev);
-	if(err) return(-errno);
-	return(0);
+	err = mknod(file, mode, os_makedev(major, minor));
+	if (err)
+		return -errno;
+	return 0;
 }
 
 int link_file(const char *to, const char *from)
@@ -309,20 +333,21 @@ int link_file(const char *to, const char *from)
 	int err;
 
 	err = link(to, from);
-	if(err) return(-errno);
-	return(0);
+	if (err)
+		return -errno;
+	return 0;
 }
 
-int do_readlink(char *file, char *buf, int size)
+int hostfs_do_readlink(char *file, char *buf, int size)
 {
 	int n;
 
 	n = readlink(file, buf, size);
-	if(n < 0)
-		return(-errno);
-	if(n < size)
+	if (n < 0)
+		return -errno;
+	if (n < size)
 		buf[n] = '\0';
-	return(n);
+	return n;
 }
 
 int rename_file(char *from, char *to)
@@ -330,21 +355,23 @@ int rename_file(char *from, char *to)
 	int err;
 
 	err = rename(from, to);
-	if(err < 0) return(-errno);
-	return(0);
+	if (err < 0)
+		return -errno;
+	return 0;
 }
 
 int do_statfs(char *root, long *bsize_out, long long *blocks_out,
 	      long long *bfree_out, long long *bavail_out,
 	      long long *files_out, long long *ffree_out,
-	      void *fsid_out, int fsid_size, long *namelen_out,
-	      long *spare_out)
+	      void *fsid_out, int fsid_size, long *namelen_out)
 {
 	struct statfs64 buf;
 	int err;
 
 	err = statfs64(root, &buf);
-	if(err < 0) return(-errno);
+	if (err < 0)
+		return -errno;
+
 	*bsize_out = buf.f_bsize;
 	*blocks_out = buf.f_blocks;
 	*bfree_out = buf.f_bfree;
@@ -355,22 +382,6 @@ int do_statfs(char *root, long *bsize_out, long long *blocks_out,
 	       sizeof(buf.f_fsid) > fsid_size ? fsid_size :
 	       sizeof(buf.f_fsid));
 	*namelen_out = buf.f_namelen;
-	spare_out[0] = buf.f_spare[0];
-	spare_out[1] = buf.f_spare[1];
-	spare_out[2] = buf.f_spare[2];
-	spare_out[3] = buf.f_spare[3];
-	spare_out[4] = buf.f_spare[4];
-	spare_out[5] = buf.f_spare[5];
-	return(0);
-}
 
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+	return 0;
+}